export function serializeLink(thing) {
    const ret = {};
    ret.name = thing.name;
    ret.directory = thing.directory;
    if (thing.color) ret.color = thing.color;
    return ret;
}

export function serializeContribs(contribs) {
    return contribs.map(({ who, what }) => {
        const ret = {};
        ret.artist = serializeLink(who);
        if (what) ret.contribution = what;
        return ret;
    });
}

export function serializeImagePaths(original, {thumb}) {
    return {
        original,
        medium: thumb.medium(original),
        small: thumb.small(original)
    };
}

export function serializeCover(thing, pathFunction, {
    serializeImagePaths,
    urls
}) {
    const coverPath = pathFunction(thing, {
        to: urls.from('media.root').to
    });

    const { artTags } = thing;

    const cwTags = artTags.filter(tag => tag.isContentWarning);
    const linkTags = artTags.filter(tag => !tag.isContentWarning);

    return {
        paths: serializeImagePaths(coverPath),
        tags: linkTags.map(serializeLink),
        warnings: cwTags.map(tag => tag.name)
    };
}

export function serializeGroupsForAlbum(album, {
    serializeLink
}) {
    return album.groups.map(group => {
        const index = group.albums.indexOf(album);
        const next = group.albums[index + 1] || null;
        const previous = group.albums[index - 1] || null;
        return {group, index, next, previous};
    }).map(({group, index, next, previous}) => ({
        link: serializeLink(group),
        descriptionShort: group.descriptionShort,
        albumIndex: index,
        nextAlbum: next && serializeLink(next),
        previousAlbum: previous && serializeLink(previous),
        urls: group.urls
    }));
}

export function serializeGroupsForTrack(track, {
    serializeLink
}) {
    return track.album.groups.map(group => ({
        link: serializeLink(group),
        urls: group.urls,
    }));
}
